Schreiber G, Bohnenstengel G, Glander J, Günther E, Horn K, Kleekamp N, Müller R, Neumann H J, Rätz K H, Reich P, Seyfarth K, Taube K M, Thümmler R, Weller J
Dermatol Monatsschr. 1979 Jan;165(1):36-40.
Collective investigations of fertility in childless married couples were carried out in 9 andrological health centres of the GDR. Analysis of 1937 spermatograms in comparison to fertility after 1 to 2 years shows: (1) Fertility decreases significantly at sperm density nearly 10 million per ml. (2) Motility below 60 per cent caused reduced fertility. Normal motility is more important than normal density of spermatozoa. (3) Fructose level doesn't correlate to motility or fertility of man.
德意志民主共和国的9个男性学健康中心对无子女已婚夫妇的生育情况进行了集体调查。对1937份精子图谱进行分析，并与1至2年后的生育情况进行比较，结果显示：（1）当精子密度接近每毫升1000万个时，生育能力显著下降。（2）活力低于60%会导致生育能力下降。正常的活力比正常的精子密度更重要。（3）果糖水平与男性的活力或生育能力无关。
